4.5 Strings

Notes

A string is a sequence of characters. Each character has an index starting at 0.

word = "python"
print(word[0])     # p
print(word[-1])    # n
print(word[1:4])   # yth
print(len(word))   # 6

• Negative indexes count from the end. A slice s[a:b] starts at index a and stops before b.
• + joins strings, and * repeats them: "ha" * 3 is "hahaha".
• Useful methods: .upper(), .lower(), .replace("a", "b"), .strip().
• Strings are immutable: methods return a new string instead of changing the original.